Ok, prove me wrong.
I think the burden is on you to prove that "Tether printing" is important. Even the University of Texas report
pointed to a very low level of statistical relevance. Tether issuance may not be
random, but nobody has proven that it has a meaningful effect on price:
The authors suggest the cryptocurrency exchange Bitfinex buys bitcoin with another cryptocurrency -- tether -- to push up Bitcoin prices. How much? Four basis points per 100 bitcoin. With Bitcoin at $10,000, for example, that means Bitfinex spends $1 million to push the price up to $10,004.
Here I state that a bear market, which is a prolongued (3 years +) correction of crypto prices, will never happen reason being the occasional bursts of tether issuing which is something nobody can police.
Any number of exchanges/brokers could be engaging in price manipulation. I believe the Chinese exchanges (particularly Okcoin.cn, Okcoin.com futures and Huobi) heavily manipulated price (or attempted to) for years. This is true of regulated markets as well.